function tab(n) {
	var t,d;
	for(var i=0; i<4; i++) {
		t=document.getElementById("tab"+i);
		d=document.getElementById("tab"+i+"_content");
		dup=document.getElementById("tab"+i+"_upcontent");
		
		if(i==n) {
			if(t) {
				t.style.backgroundImage = 'url(../img/tab_s.gif)';
				t.style.color="black";
			}
			d.style.display="block";
			dup.style.display="block";
		}
		else {
			if(t) {
				t.style.backgroundImage = 'url(../img/tab.gif)';
				t.style.color="white";
			}
			d.style.display="none";
			dup.style.display="none";
		}
	}
}


function change_termin(val) {
	var price = val.split("/");
	price = price[1];
	document.getElementById("osoby_price").value = price;

	change();
}

function change() {
	var i,j;
	var sum=0;
	for(i=0; i<11; i++) {
		if(document.getElementById("osoby_"+i).checked==true) {
			sum -= -(document.getElementById("osoby_price").value*i);
		}
	}
	if(document.getElementById("osoby_3_price")) {
		for(i=0; i<11; i++) {
			if(document.getElementById("osoby_3_"+i).checked==true) {
				sum -= -(document.getElementById("osoby_3_price").value*i);
			}
		}
	}
	for(i=0; 1; i++) {
		if(!document.getElementById("zlavy_"+i+"_price"))
			break;
		for(j=0; j<11; j++) {
			if(document.getElementById("zlavy_"+i+"_"+j).checked==true) {
				sum -= -(document.getElementById("zlavy_"+i+"_price").value*j);
				//alert("Z: "+document.getElementById("zlavy_"+i+"_price").value*j);
			}
		}
	}
	for(i=0; 1; i++) {
		if(!document.getElementById("pripoistenia_"+i+"_price"))
			break;
		for(j=0; j<11; j++) {
			if(document.getElementById("pripoistenia_"+i+"_"+j).checked==true) {
				sum -= -(document.getElementById("pripoistenia_"+i+"_price").value*j);
			}
		}
	}
	
	if(sum<0) sum=0;
	
	document.getElementById("total_price").innerHTML = sum.toFixed(2).replace(".",",");
}


function buy_item(item) {
	
	var termin;
	if(document.getElementById("select_termin"))
		termin = document.getElementById("select_termin").value;
	else
		termin = "";
	
	var err="";
	if(document.getElementById("select_termin") && termin=="")
		err += ', Termín';

	var params = "";
	for(i=0; i<11; i++) {
		if(document.getElementById("osoby_"+i).checked==true && i!=0) {
			params += "|"+document.getElementById("osoby_name").value+";"+i+";"+document.getElementById("osoby_price").value+";"+(document.getElementById("osoby_price").value*i);
		}
	}
	if(document.getElementById("osoby_3_price")) {
		for(i=0; i<11; i++) {
			if(document.getElementById("osoby_3_"+i).checked==true && i!=0) {
				params += "|"+document.getElementById("osoby_3_name").value+";"+i+";"+document.getElementById("osoby_3_price").value+";"+(document.getElementById("osoby_3_price").value*i);
			}
		}
	}
	
	for(i=0; 1; i++) {
		if(!document.getElementById("zlavy_"+i+"_price"))
			break;
		for(j=0; j<11; j++) {
			if(document.getElementById("zlavy_"+i+"_"+j).checked==true && j!=0) {
				params += "|"+document.getElementById("zlavy_"+i+"_name").value+";"+j+";"+document.getElementById("zlavy_"+i+"_price").value+";"+(document.getElementById("zlavy_"+i+"_price").value*j);
			}
		}
	}
	for(i=0; 1; i++) {
		if(!document.getElementById("pripoistenia_"+i+"_price"))
			break;
		for(j=0; j<11; j++) {
			if(document.getElementById("pripoistenia_"+i+"_"+j).checked==true && j!=0) {
				params += "|"+document.getElementById("pripoistenia_"+i+"_name").value+";"+j+";"+document.getElementById("pripoistenia_"+i+"_price").value+";"+(document.getElementById("pripoistenia_"+i+"_price").value*j);
			}
		}
	}
	
	
	
	if(err=="") {
	//window.open('buy.php?mid='+item+'&amount='+amount+'&color='+color+'&size='+size,'editWindow','resizable=no,scrollbars=no,status=yes,width=730,height=550,menubar=no');
		window.location = 'index.php?action=buy&mid='+item+'&termin='+termin+'&params='+params+'&p=_cart';
	}
	else {
		alert("Vyplňte prosím všetky parametre objednávky: "+err.substr(2));
	}
}

function color_thumb_change(sel) {
	
	document.getElementById("color_value").innerHTML = document.getElementById("color_"+sel.value).innerHTML;

	for(var i=0; i!=-1; i++) {
		var img = document.getElementById("color_thumb_"+i);
		if(!img) break;
		
		if(i==sel.value)
			img.style.display="inline";
		else
			img.style.display="none";
	}
}